CVE-2025-56429Public exploitNetwork attack vector

Session data exposure via unescaped POST debug output

Published Dec 10, 2025 · Updated Dec 10, 2025

Reflected XSS in Fearless Geek Media FearlessCMS 0.0.2-15 allows remote attackers to run JavaScript through the login form. login.php passes the complete POST body through print_r() and inserts the unescaped result into an HTML debug comment, so a username can close the comment and inject script. No authentication is required, but a victim must process the crafted login response; injected code runs in the vulnerable site's browser context and can read accessible session data.

CVSS severity6.1
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Fearless Geek Media FearlessCMS 0.0.2-15 allows remote attackers to run JavaScript through the login form. login.php passes the complete POST body through print_r() and inserts the unescaped result into an HTML debug comment, so a username can close the comment and inject script. No authentication is required, but a victim must process the crafted login response; injected code runs in the vulnerable site's browser context and can read accessible session data.

The record

CVE
CVE-2025-56429
Published
Dec 10, 2025
Updated
Dec 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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